Synonymy: Neptunea laticostata Golikov, 1962: 5-7, figs 6-7. Taxonomic history: The shells described as Neptunea laticostata ochotensis by Golikov (1962: 7-8, fig. 10) are different and the taxon is elevated to specific status. The shells described as Neptunea laticostata laticostata var. praerosa by Golikov (1962: 6-7, fig. 8) belong to a different species and we refer them to Neptunea occaecata n. sp. Type material: Holotype in ZIN 14793/1 (Kantor & Sysoev, 2006: 192). The holotype is specified by Golikov (1962: 6) in the original description as "mollusc (holotype), having an age of 18 years, is 106 mm, diameter 62 mm,...". The specimen figured by Kantor & Sysoev (2006: pl. 97, fig. B) is the specimen labelled as "holotype" in ZIN, but with a size of 101.8 mm. This is indeed the specimen figured by Golikov on fig. 7. Over the years the protoconch has been broken, hence the 4 mm smaller length. Type locality: "Southern Kamchatka and the islands Schumschu, Paramushir and Onekotan" (Golikov, 1962: 7); "Vitjaz" st.2763, north-eastward of Paramushir Island, 49° 39,6'N, 156° 18'3 E, 248 m (Kantor & Sysoev, 2006: 192). Description: The translation below may still include some characteristics of Neptunea laticostata laticostata var. praerosa Golikov, 1962 which is regarded as a distinct species and described in his book as Neptunea occaecata n. sp. "The shell can reach a large size, with 7-8 moderately convex whorls. The upper part of the 2 last whorls is often noticeably convex and rounded or forming a narrow, slightly sloping plate as on the upper whorls. The upper whorls are rather short. The last whorl is slightly more than 3/4 of total shell height. The suture is well recognizable, narrow, but shallow. The embryonal shell is rather big, with 2 smooth, rounded, convex, white whorls. In large specimens it is usually broken or eroded. The periostracum is rather thin, transparant, easely detaching and usually yellow in colour. The shell has a pale pink, pale yellow or, as the holotype, a reddish brown colour. The axial sculpture is only represented by distinct growth lines. Spiral sculpture has rather thin, rather narrow, rounded keels. On the spire whorls there are 2-3 keels, on the last whorl 3-4 keels. The holotype has 3 keels on each spire whorl and on the last whorl - 4 keels. Interspace between the keels and the whole surface of the shell is covered by cords, which are slightly inflated or convex. The width of the ribs, on the last part of the shell, can reach 1,5-2 mm and is sometimes equal or even slightly broader than the keels. The interspaces on the last whorl have occasionally 1 narrower little cord. Between the keels of the last whorl are 4-6 cords. The interspace between the keels on the last whorl is about 6 mm. In some cases, when the keels on the last whorl are eroded, the difference between keels and cords becomes unclear. The radula of examined specimens has 3 lateral and 3-4 central cusps.... The aperture is wide, oval pear-shaped, pale pink, almost white or yellowish pink in colour; occasionally with dark brown or orange spots on the edge of the siphonal canal near the columella. The outer lip is wide, rounded, not very thin, but rather fragile; the callus is moderately developed. The siphonal canal is rather wide, the siphonal projection is long and more or less curved to the left and remarkably not curved at the dorsum. Height of this mollusc (holotype), having an age of 18 years, is 106 mm, diameter- 62 mm, height of last whorl -84 mm, height of aperture - 67 mm, width of aperture - 29 mm, length of siphonal projection 29 mm, width of siphonal canal - 10 mm. The biggest specimen was discovered in the Pacific Ocean -south-east off Paramushir Island, belongs to varietate praerosa and having an age of 23-24 years, has a shell height of 176 mm, diameter 118 mm, height of last whorl 139 mm, height of aperture 112 mm, width of aperture 65 mm, length of siphonal projection 44 mm and width of siphonal canal 16 mm. (translated from Golikov, 1962: 5-6, in Russian). Range and habitat: Neptunea laticostata lives off eastern Kamchatka Peninsula and the northern Kuril Islands. Bathymetric range between 120 and 360 m. Found sympatrically with Neptunea occaecata n. sp. in the Gulf of Oljutor. Comparison: Neptunea laticostata has a large (up to 170 mm), thin shell with sharp primary spiral cords. The secondary spiral cords are fine, the interspace situated just above the shoulder has one slightly stronger secondary spiral cord in the middle. The subsutural slope is broad, the profile strongly twisted with a thick subsutural elevation adapically and a strongly concave, hollow slope adapically. The colour ranges from white over yellowish to pale brown, with dark red coloured primary spiral cords. Neptunea occaecata n. sp., hitherto known as Neptunea laticostata laticostata var. praemorsa, differs in having a smoother spiral sculpture, with broader (primary and secondary) spiral cords, a straight subsutural slope without subsutural cord, a broader shape usually with convex whorls, a heavier shell and a more uniform colour. Neptunea ochotensis, originally described as a subspecies of Neptunea laticostata, differs in having 1 sharp spiral angulation on the upper spire whorls (instead of 2 sharp spiral cords), a straight subsutural slope and a smoother spiral sculpture. Usually the colour is white or pale yellowish.